Type-writing machine.



PATENTED JULY 14, 1908. G. F. STILLMAN, DEOD.

M- n. STILLMAN, ADMINISTRATRIX. TYPE WRITING MACHINE. APPLIOATION FILEDAPR. 21. 1904. RENEWED JAN. 19. 1907.

WITNESSES MTZ'ORNEK lines.

UNITED STATES PATEN i.

GEORGE F. STILLMAN, OF SYRACUSE, NEW YORK; MABEL D. STILLMAN,ADMINISTRATRIX OF SAID GEORGE F. STILLMAN, DECEASED, ASSIGNOR TO THESMITH PREMIER TYPE- WRITER COMPANY, OF SYRACUSE, NEW YORK, A CORPORATIONOF NEW YORK.

TYPE-WRITING MACHINE.

Specification of Letters Patent.

Patented July 14, 1908.

Application filed April 21, 1904, Serial No. 204,244. Renewed January19, 1907. Serial No. 353,139.

To all whom it may concern:

Be it known that I, GEORGE E. STILLMAN,

of Syracuse, in the county of Onondaga, in 1 the State of New York, haveinvented new and useful Improvements in T ype-lVriting Machines, ofwhich the following, taken in connection with the accompanying drawings,is a full, clear, and exact description.

This invention relates to improvements in typewriting machines andrefers more particularly to the type bar and its hanger to be used inconnection with visible writing machines.

In visible writing machines the full complement of type bars areordinarily confined within a segment of less than a half circle. Thisrequires that the individual hangers be placed side by side and closetogether in a substantially circular are having its center at or nearthe printing point.

One of the objects of my invention is to make the individual hangers andthe joint between each type bar and its hanger, as narrow as possibleand at the same time give each type bar a comparatively broad bearingconcentric with its axis of revolution.

Another object of my invention is to provide each type bar with oppositeanti-friction, bearing points which are disposed concentrically aroundthe axis of revolution of the bar equidistant from each other so as tooppose the end thrust and axial movement of the bar, and thus maintainthe perfect alinement of the type at the printing point.

To the above and other ends which will hereinafter appear, my inventionconsists of the features of construction, arrangements of parts andcombinations of devices set forth in the following specification andparticularly pointed out in the appended claims.

In the drawings, Figure 1 is a side elevation of my improved type barand hanger construction, the hanger being shown secured to a segment andthe type bar broken away, the type bar being shown in normal position infull lines and in printing position in dotted Fig. 2 is an enlargedsectional View of the same taken on the line 22 of Fig. 1. Figs. 3 and 4are opposite face views of one of the individual hangers. Fig. 5 is asectional View similar to Fig. 2 of a modified form of type bar andhanger in which the anti-friction balls and pockets are formed in theheel of the type bar instead of in the hanger.

Similar reference characters indicate cor- Various styles of typewritingmachines.

In carrying out the objects stated, I provide a support l which usuallyconsists of a segment of a metal ring and is fixedly mounted in theframe of the machine in any desired manner (not necessary to hereinillustrate or describe) for the purpose of supporting a number ofindividual type bar hangers -2-. These hangers 2* are preferably securedin an upright position side by side upon the segment 1 by suitablefastening means, as screws 3, and each is provided with a transversecircular opening 4, Figs. 2,3 and 4, having opposed annular walls -5which are beveled transversely at an angle with the axis of the openingto form a V-shaped annular rib 6 surrounding the opening. The beveledsides of this rib are each formed with a series of (in this instancethree) ball pockets or sockets 7 having ball seats -8 at their bases toreceive and encompass suit able balls 9-. These sockets are disposed atsubstantially right angles to their respective sides and those of oneside are arranged in close proximity to, but slightly in advance,circumferentially, of those of the opposite side so as to stagger theopposed pockets with each other, as will be understood by a comparisonof Figs. 3 and 4., and thus permit the use of comparatively thin stockfor the hangers.

The bases of the sockets are preferably counterbored at 10 to reduce thearea of the ball seats, thus forming a narrow annular rib or seat foreach ball, and these sockets are of such depth that when the balls areseated they protrude slightly through the open sides of their respectivebearings -14 and are clamped together of the hanger for engaging theprotruding parts of the balls 9-. These bearing plates are preferablyformed of separate pieces of thin, hard steel secured to the oppositesides of the type bar proper by rivets 13 to cover the opposite ends ofthe opening 4 and are provided with frusto-conical bearing faces 14which. ride upon their respective ball bearings 9 in the opposite sidesof the Vj-shaped annular rib 6. As best seen in Fig. 2 the centers ofthese plates are depressed or dished in opposite directions and pass inopposite directions into the opening -4 for the purpose of forming theconical or V-shaped at the axis of the type bar by suitablefasteningmeans as an eyelet l5.

The construction seen in Fig. 5 is substantially a reversal of that seenin Fig. 2 that is, the type bar as 11 is formed with a circular opening4 and a V-shaped annular rib having opposed beveled annular bearingfaces 5 in which are formed the sockets or ball pockets 7- similar tothe pockets 7 in the hanger in Fig. 2. In this construction the hangeris provided with opposed bearing plates having frustoconical bearings-l4 upon which ride suitable balls 9- in the sockets 7 and these platesare clamped together at the center of the opening by a screw -15 orother suitable means.

It will be seen that in both of the constructions described, the rivetor eyelet 15 and the screw 15 constitute means at the axis of the typebar for effecting an adjustment of the side plates of the type bar orhanger in planes parallel to the median plane of the type bar. in orderto effect an adjustment of the bearings or to compensate for wear ifthere be any. It will also be seen that the side plates 12 in Fig. 2 andthe corresponding plates in Fig. 5 overlap and entirely inclose the eyesor openings -4tand 4 respectively and the bearings, and that bothconstructions provide a dust proof bearing to exclude the admission ofdust to the bearing of the type bar in any direction. This feature is ofconsiderable importance in front strike typewriting machines. In suchconstructions the type bar bearings are beneath and in substantiallyvertical alinement with the front face of the platen, and dust, grit orrubbings from the paper at the front face of the platen fall upon or getinto the bearings of the type bars unless means be provided to excludethe same.

The constructions described provide for locating two series of balls insuitable pockets around the center of oscillation of the type bar so asto form bearing points which are opposed both circumferentially andaxially, and to draw the bearing plates against the balls from a centralpoint, thereby establishing a uniform pressureon all bearing points andreducing the friction and lost motion to a minimum. This gives acomparatively broad concentrlc bearing for the bar some distance fromits axis, thereby pre- 7 venting a lateral movement of the type bar asit swings to the printing position and permits the use of a large numberof type bars and hangers within a comparatively small space.

Having thus described my invention what I desire to secure by LettersPatent is:

1. In a typewriting machine, a type bar and hanger therefor, one of theparts having opposed ball pockets and the other part having oppositearms covering adjacent pockets and balls seated in the pockets, and uponwhich the arms of said other part is mounted.

2. In a typewriting machine, a type bar and hanger therefor, one of theparts having a circular opening and opposed ball pockets in the walls ofthe opening and the other part having opposite annular bearingsprojecting into the ends of the opening, the balls in the pocketsengaging the bearings of said other part.

3. In a typewriting machine, a type bar and hanger therefor, each of theparts having annular faces beveled transversely, the faces of one of thearts having a series of ball pockets and bafis in the pockets engagingthe adjacent annular face of the other part.

4. In a typewriting machine, a type bar and a hanger therefor, each parthaving opposed annular faces, the annular faces of one part each havinga series. of ball-pockets staggered with those of the other series, andballs in the pockets engaging the adjacent annular faces of andsupporting the other part.

5. In a typewriting machine, a type bar and a hanger therefor, one ofthe parts having an annular rib V shape in cross section, each of theopposite faces of the rib being provided with a series of pockets spacedequidistant from each other and the other part having beveled annularbearings at the opposite sides of said rib, and balls in the pocketsengaging the beveled bearings of the other part.

6. In a typewriting machine, a type bar and a hanger therefor, one ofthe parts having a circular opening and op osed pockets in the walls oftheopening, andf the other part hav ing opposed bearings at oppositeends of the opening and covering said pockets, and balls in the pocketsand engaging said bearings.

7. In a typewriting machine, a type bar and a hanger therefor, one ofthe parts having opposed circular rows of pockets in different planesabout a common axis, and the other part having opposed annular bearingsfacing said pockets, and balls in the pockets engaging said faces.

8. In a type-writing machine, a type-bar and a hanger therefor, one ofthe parts having opposite faces, each formed with a series of pocketsand each pocket formed with a circular ball seat, the other part havingopposite arms each formed with an annular bearing facing one series ofpockets, and a ball seated in each pocket on its circular seat andengaging the adjacent annular bearing.

9. In a typewriting machine, a type-bar j and a hanger therefor, one ofthe parts havin said pockets.

10. In a typewriting machine, the combination of a type bar, a hangertherefor, one of the parts having ball containing pockets therein, andtwo sets of separated balls contained in said pockets, the centers ofone set of balls being disposed to one side of the median plane of thetype bar bearing and the centers of the other set of balls being on theopposite side of the median plane of said bearing.

11. In a typewriting machine, the combination of a ty e bar, a hanger,one of the parts having ba l-encompassing pockets, each pocket having acircular ball seat, and balls contained in said pockets.

12. In a typewriting machine, the combination of a ty e bar, a hanger,one of the parts having ba l-encompassing pockets, each pocket having acircular ball seat, and a bearing concentric with the axis of revolutionof the type bar on the other part and with which all of said ballscooperate.

13. In a typewriting machine, the combination of a type bar, and ahanger, one of the parts having ball receiving pockets with the openmouths thereof disposed in opposite directions and each containing ananti-friction ball against which the other part bears.

14. In a typewriting machine, the combi nation of a type bar, and ahanger, one of the parts having ball containing pockets formed in thesurface thereof, each pocket surrounding the ball contained therein onall except one side thereof Where it bears on the other art. p Inwitness whereof I have hereunto set my hand this 18th day of April 1904.

GEO. F. STILLMAN. Witnesses:

MILDRED M. NoTT, HOWARD P. DENISON.

